Access mongodb connection variable accessible globally in loopback

How can I access the mongo db connection variable globally in loopback. Currently it is done by executing the async:

Alerts.getDataSource().connector.connect(function (err, db) {
    db.collection("dbname");
    ......................//other code
});

Is it possible make this db variable directly accessible from everywhere inside a model instead than calling connector.connect everywhere? Thanks in advance!

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